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Updated: May 24, 2026

A Novel Application of Musculoskeletal Ultrasound Imaging
Published on: September 17, 2013
Analysis of Doppler effect on the pulse compression of different codes emitted by an ultrasonic LPS
José A Paredes1, Teodoro Aguilera, Fernando J Alvarez
1Sensory Systems Research Group, University of Extremadura, 06006 Badajoz. japaredesm@unex.es
Abstract:
This work analyses the effect of the receiver movement on the detection by pulse compression of different families of codes characterizing the emissions of an ultrasonic local positioning system. Three families of codes have been compared: Kasami, Complementary Sets of Sequences and Loosely Synchronous, considering in all cases three different lengths close to 64, 256 and 1,024 bits. This comparison is first carried out by using a system model in order to obtain a set of results that are then experimentally validated with the help of an electric slider that provides radial speeds up to 2 m/s. The performance of the codes under analysis has been characterized by means of the auto-correlation and cross-correlation bounds. The results derived from this study should be of interest to anyone performing matched filtering of ultrasonic signals with a moving emitter/receiver.
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